IT1051570B - Perfezionamento nelle tastiere a pulsanti particolarmente per calcolatori elettronici e simili - Google Patents
Perfezionamento nelle tastiere a pulsanti particolarmente per calcolatori elettronici e similiInfo
- Publication number
- IT1051570B IT1051570B IT4867574A IT4867574A IT1051570B IT 1051570 B IT1051570 B IT 1051570B IT 4867574 A IT4867574 A IT 4867574A IT 4867574 A IT4867574 A IT 4867574A IT 1051570 B IT1051570 B IT 1051570B
- Authority
- IT
- Italy
- Prior art keywords
- calculators
- improvement
- electronic
- similar
- button keyboards
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
- G06C7/00—Input mechanisms
- G06C7/02—Keyboards
- G06C7/08—Keyboards with one set of keys for all denominations, e.g. ten-key board
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
- H01H13/64—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/7006—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard comprising a separate movable contact element for each switch site, all other elements being integrated in layers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Push-Button Switches (AREA)
- Input From Keyboards Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00334345A US3808384A (en) | 1971-06-01 | 1973-02-21 | Pushbutton keyboard system |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1051570B true IT1051570B (it) | 1981-05-20 |
Family
ID=23306796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT4867574A IT1051570B (it) | 1973-02-21 | 1974-02-25 | Perfezionamento nelle tastiere a pulsanti particolarmente per calcolatori elettronici e simili |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS5036033A (es) |
AR (1) | AR200765A1 (es) |
BR (1) | BR7401238D0 (es) |
CA (1) | CA1019793A (es) |
DE (1) | DE2408423B2 (es) |
ES (1) | ES423441A1 (es) |
IT (1) | IT1051570B (es) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3010515A1 (de) * | 1980-03-19 | 1981-09-24 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Tastatur |
DE3110886A1 (de) * | 1981-03-20 | 1982-09-30 | Kienzle Apparate Gmbh, 7730 Villingen-Schwenningen | In einem gehaeuse angeordnete tastatur |
DE9200205U1 (de) * | 1992-01-10 | 1993-02-04 | Dyna Systems GmbH, 8999 Scheidegg | Eingabetastatur für besondere Umweltbedingungen |
-
1974
- 1974-02-20 BR BR123874A patent/BR7401238D0/pt unknown
- 1974-02-20 ES ES423441A patent/ES423441A1/es not_active Expired
- 1974-02-21 AR AR25247474A patent/AR200765A1/es active
- 1974-02-21 JP JP49021024A patent/JPS5036033A/ja active Pending
- 1974-02-21 CA CA193,181A patent/CA1019793A/en not_active Expired
- 1974-02-21 DE DE19742408423 patent/DE2408423B2/de not_active Withdrawn
- 1974-02-25 IT IT4867574A patent/IT1051570B/it active
Also Published As
Publication number | Publication date |
---|---|
ES423441A1 (es) | 1976-06-01 |
JPS5036033A (es) | 1975-04-04 |
CA1019793A (en) | 1977-10-25 |
BR7401238D0 (pt) | 1974-11-19 |
DE2408423A1 (de) | 1974-09-05 |
DE2408423B2 (de) | 1977-03-03 |
AR200765A1 (es) | 1974-12-13 |
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